🔐 Double opt-in email verification system with Google Sheets
Ready for 3.0Ready for 3.0. This template uses no nodes that n8n 3.0 removes. No removed nodes, versions or helpers found. Static check, last run 2026-10-19.
What this workflow does
This workflow has 12 nodes and runs when someone submits an n8n form. Along the way it connects Google Sheets.
How it runs
Trigger: When someone submits an n8n form.
- Email Form (n8n Form): shows the next form page
- Generate Code (Code): runs custom JavaScript code
- Store Data (Google Sheets): uses Google Sheets
- Send Email: sends an email over SMTP
- Verification Form (n8n Form): shows the next form page
- Check Code (If): checks a condition and branches into true / false
- Main Form (n8n Form): shows the next form page
- Incorrect Code Form (n8n Form): shows the next form page
- Second Check (If): checks a condition and branches into true / false
- Reset Form (n8n Form): shows the next form page
Services it uses
Before you upgrade to n8n 3.0
Nothing in this workflow is removed in n8n 3.0, so it should import and run after the upgrade.
Nodes used (7)
- n8n Form Trigger
n8n-nodes-base.formTrigger - n8n Form
n8n-nodes-base.form - Code
n8n-nodes-base.code - Send Email
n8n-nodes-base.emailSend - Google Sheets
n8n-nodes-base.googleSheets - If
n8n-nodes-base.if - No Operation, do nothing
n8n-nodes-base.noOp
From the author
This template implements a professional Double Opt-In email verification system using Google Sheets as a database. The workflow collects user emails, generates unique verification codes, stores them securely, and validates user access before proceeding with…